code: def time_dist(time_t, time_s):
      dt = time_t - time_s
      return dt
  
file_path: deepgraph/doc/source/tutorials/10min_to_deepgraph.py
imports: import matplotlib.pyplot
  import numpy
  import pandas
  import deepgraph
label_desc: Use image node_id 4 for calling a global function with example usage: time_dist(time_t, time_s) and returns: dt